# -*- coding:utf-8 -*-
#
#   author: iflytek
#
#  本demo测试时运行的环境为：Windows + Python3.7
#  本demo测试成功运行时所安装的第三方库及其版本如下，您可自行逐一或者复制到一个新的txt文件利用pip一次性安装：
#   cffi==1.12.3
#   gevent==1.4.0
#   greenlet==0.4.15
#   pycparser==2.19
#   six==1.12.0
#   websocket==0.2.1
#   websocket-client==0.56.0
#
#  语音听写流式 WebAPI 接口调用示例 接口文档（必看）：https://doc.xfyun.cn/rest_api/语音听写（流式版）.html
#  webapi 听写服务参考帖子（必看）：http://bbs.xfyun.cn/forum.php?mod=viewthread&tid=38947&extra=
#  语音听写流式WebAPI 服务，热词使用方式：登陆开放平台https://www.xfyun.cn/后，找到控制台--我的应用---语音听写（流式）---服务管理--个性化热词，
#  设置热词
#  注意：热词只能在识别的时候会增加热词的识别权重，需要注意的是增加相应词条的识别率，但并不是绝对的，具体效果以您测试为准。
#  语音听写流式WebAPI 服务，方言试用方法：登陆开放平台https://www.xfyun.cn/后，找到控制台--我的应用---语音听写（流式）---服务管理--识别语种列表
#  可添加语种或方言，添加后会显示该方言的参数值
#  错误码链接：https://www.xfyun.cn/document/error-code （code返回错误码时必看）
# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
import _thread as thread
import time
from time import mktime
from API_KEY import *
import websocket

import base64
import datetime
import hashlib
import hmac
import json
import ssl
from datetime import datetime
from urllib.parse import urlencode
from wsgiref.handlers import format_date_time

from audio.audio_record_play import record_audio

STATUS_FIRST_FRAME = 0  # 第一帧的标识
STATUS_CONTINUE_FRAME = 1  # 中间帧标识
STATUS_LAST_FRAME = 2  # 最后一帧的标识

class Ws_Param(object):
    # 初始化
    def __init__(self, APPID, APIKey, APISecret, AudioFile):
        self.APPID = APPID
        self.APIKey = APIKey
        self.APISecret = APISecret
        self.AudioFile = AudioFile
        self.iat_params = {
            "domain": "slm", "language": "zh_cn", "accent": "mandarin", "dwa": "wpgs", "result":
                {
                    "encoding": "utf8",
                    "compress": "raw",
                    "format": "plain"
                }
        }

    # 生成url
    def create_url(self):
        url = 'ws://iat.xf-yun.com/v1'
        # 生成RFC1123格式的时间戳
        now = datetime.now()
        date = format_date_time(mktime(now.timetuple()))

        # 拼接字符串
        signature_origin = "host: " + "iat.xf-yun.com" + "\n"
        signature_origin += "date: " + date + "\n"
        signature_origin += "GET " + "/v1 " + "HTTP/1.1"
        # 进行hmac-sha256进行加密
        signature_sha = hmac.new(self.APISecret.encode('utf-8'), signature_origin.encode('utf-8'),
                                 digestmod=hashlib.sha256).digest()
        signature_sha = base64.b64encode(signature_sha).decode(encoding='utf-8')

        authorization_origin = "api_key=\"%s\", algorithm=\"%s\", headers=\"%s\", signature=\"%s\"" % (
            self.APIKey, "hmac-sha256", "host date request-line", signature_sha)
        authorization = base64.b64encode(authorization_origin.encode('utf-8')).decode(encoding='utf-8')
        # 将请求的鉴权参数组合为字典
        v = {
            "authorization": authorization,
            "date": date,
            "host": "iat.xf-yun.com"
        }
        # 拼接鉴权参数，生成url
        url = url + '?' + urlencode(v)
        # print("date: ",date)
        # print("v: ",v)
        # 此处打印出建立连接时候的url,参考本demo的时候可取消上方打印的注释，比对相同参数时生成的url与自己代码生成的url是否一致
        # print('websocket url :', url)
        return url

# 定义全局变量存储识别结果
list_result = []

# 收到websocket消息的处理
def on_message(ws, message):
    global final_result
    message = json.loads(message)
    code = message["header"]["code"]
    status = message["header"]["status"]
    if code != 0:
        print(f"请求错误：{code}")
        ws.close()
    else:
        payload = message.get("payload")
        if payload:
            text = payload["result"]["text"]
            text = json.loads(str(base64.b64decode(text), "utf8"))
            text_ws = text['ws']
            result = ''
            for i in text_ws:
                for j in i["cw"]:
                    w = j["w"]
                    result += w
            # print(result)
            list_result.append(result)
        if status == 2:
            ws.close()

# 收到websocket错误的处理
def on_error(ws, error):
    print("### error:", error)

# 收到websocket关闭的处理
def on_close(ws, close_status_code, close_msg):
    print("### closed ###")

# 收到websocket连接建立的处理
def on_open(ws):
    def run(*args):
        frameSize = 1280  # 每一帧的音频大小
        intervel = 0.04  # 发送音频间隔(单位:s)
        status = STATUS_FIRST_FRAME  # 音频的状态信息，标识音频是第一帧，还是中间帧、最后一帧

        with open(wsParam.AudioFile, "rb") as fp:
            while True:

                buf = fp.read(frameSize)
                audio = str(base64.b64encode(buf), 'utf-8')

                # 文件结束
                if not buf:
                    status = STATUS_LAST_FRAME
                # 第一帧处理
                if status == STATUS_FIRST_FRAME:

                    d = {"header":
                        {
                            "status": 0,
                            "app_id": wsParam.APPID
                        },
                        "parameter": {
                            "iat": wsParam.iat_params
                        },
                        "payload": {
                            "audio":
                                {
                                    "audio": audio, "sample_rate": 16000, "encoding": "raw"
                                }
                        }}
                    d = json.dumps(d)
                    ws.send(d)
                    status = STATUS_CONTINUE_FRAME
                # 中间帧处理
                elif status == STATUS_CONTINUE_FRAME:
                    d = {"header": {"status": 1,
                                    "app_id": wsParam.APPID},
                         "parameter": {
                             "iat": wsParam.iat_params
                         },
                         "payload": {
                             "audio":
                                 {
                                     "audio": audio, "sample_rate": 16000, "encoding": "raw"
                                 }}}
                    ws.send(json.dumps(d))
                # 最后一帧处理
                elif status == STATUS_LAST_FRAME:
                    d = {"header": {"status": 2,
                                    "app_id": wsParam.APPID
                                    },
                         "parameter": {
                             "iat": wsParam.iat_params
                         },
                         "payload": {
                             "audio":
                                 {
                                     "audio": audio, "sample_rate": 16000, "encoding": "raw"
                                 }}}
                    ws.send(json.dumps(d))
                    break

                # 模拟音频采样间隔
                time.sleep(intervel)

    thread.start_new_thread(run, ())

if __name__ == "__main__":
    # 测试时候在此处正确填写相关信息即可运行
    file_name = "data/output.wav"
    # 示例：录制10秒的音频
    record_audio(file_name, 5)
    wsParam = Ws_Param(APPID=appid, APISecret=api_secret,
                       APIKey=apikey,
                       AudioFile=r'data/output.wav')
    websocket.enableTrace(False)
    wsUrl = wsParam.create_url()
    ws = websocket.WebSocketApp(wsUrl, on_message=on_message, on_error=on_error, on_close=on_close)
    ws.on_open = on_open
    ws.run_forever(sslopt={"cert_reqs": ssl.CERT_NONE})

    final_result = list_result[-2] + list_result[-1]
    # WebSocket连接关闭后，获取最终结果
    print("最终识别结果：", final_result)


